That Batch Tools tabsheet is supposed to be hidden only when PDFE is running in Lite mode, so I suppose the DiskTree scan mode is also hidden? Check from the program Help>About box, under the version, if you see a reference to the Lite mode.That mode is imposed by configuration files, so there is the possibility you have one of these files corrupted. Try again with a clean install, uninstalling first your current instance, to see what happens.

And please try to use the English names to reference any of these PDFE features, so I, and others, can more quickly understand to what feature you are referencing. You can easily change to the English interface localization from Edit>Preferences.